The form is submitted form data, back-channel open, but still reported 400 error page

Add enctype = 'multipart / form-data' label in the form the form

Since learning JAVA took the longest a BUG. . . . 3 hours F ***

[Reserved] https://my.oschina.net/u/3234452/blog/1555598

 

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Origin www.cnblogs.com/DSLLMV/p/11072812.html